.NET Aspire is a cloud-ready, opinionated stack from Microsoft designed to simplify building, deploying, and monitoring distributed applications. It handles configuration wiring, service discovery, and dependency management through NuGet packages, eliminating tedious YAML/XML/JSON setup. Key benefits include a unified app host that serves as a single source of truth, built-in OpenTelemetry-based observability dashboard, and support for any cloud or containerization platform. Aspire is not limited to microservices — it works equally well with modular monoliths, as long as services are loosely coupled. For enterprise teams, it reduces configuration drift, accelerates developer onboarding, and cuts time-to-market. Migrating an existing app to Aspire is incremental and feasible within a sprint or two, provided the codebase is already modular. Microsoft itself uses Aspire internally, including for Bing.